This is a Makeblock 3.7V Rechargeable Li-polymer Battery For mBot Robot Kit P3090003. It comes as pictured and does not include any additional parts or accessories.

Features:

• 3.7V recheargeable Li-Po battery for Makeblock mBot robot kit.
• Initial capacity ≥ 1800mA.
• The standard 2-pin JST-PH connector – 2mm spacing between pins.
• Compatible with mBot Robot Kit.